<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>404-请用pc端登录</title>
    <style>
        *{
            margin: 0;
            padding: 0;
            box-shadow: border-box;
        }
        .box{
            width:700px;
            height:590px;
            margin: 20px auto;
        }
    </style>
</head>
<body>
    <div class="box">
        <img src="images/404.jpg" style="width:100%;height:100%">
    </div>
    
</body>
<script>
    alert('很抱歉，该系统暂不对手机端开放，请移步PC端');   
</script>
</html>